Cooling units, stators and wind turbines

Abstract

The invention discloses a cooling device, a stator and a wind driven generator. The cooling device comprises an air cooling system and a liquid cooling pipeline; the air cooling system comprises a gaseous medium flowing path enabling a gaseous medium to circulate in the wind driven generator and a first heat exchange device arranged on the gaseous medium flowing path; the liquid cooling pipeline comprises a first part located in the first heat exchange device and a second part located in the stator or on the outer surface of the stator; and cooling liquid in the liquid cooling pipeline flows through the first part and the second part in sequence. With the air cooling system and the liquid cooling pipeline combined, the cooling efficiency of the wind driven generator is improved, the internal temperature rise and temperature gradient of the wind driven generator are reduced, and the cooling device has the advantages of high reliability, easiness in maintenance and low cost.

Description

technical field

[0001] The invention relates to the field of wind power generation, in particular to a cooling device, a stator and a wind power generator. Background technique

[0002] The copper loss and iron loss generated during the operation of the wind turbine will cause the temperature rise of the components of the wind turbine. Excessive temperature rise will directly affect the life of the wind turbine and even cause it to fail to operate normally. Among the various parts of the motor, the winding insulation is most obviously affected by the temperature rise. Every 10°C increase in the winding insulation temperature will reduce the life of the winding insulation by about half. Exceeding the limit range, more seriously, may also cause complete breakdown of insulation and damage to the motor. For permanent magnet wind turbines, the temperature of the permanent magnets also needs to be controlled within a certain limit to prevent permanent degradation of motor perform...

Examples

Embodiment 1

[0071] Such as Figure 1-4 As shown, this embodiment is a cooling device 100 for a wind-driven generator. The wind-driven generator includes a stator, a rotor 30, an air gap 13 between the stator and the rotor 30, and a cooling device 100 for cooling the wind-driven generator. The cooling device 100 includes an air cooling system and a liquid cooling pipeline; the air cooling system includes a gaseous medium flow path for the gaseous medium to circulate inside the wind turbine and a first heat exchange device 11 arranged on the gaseous medium flow path; the liquid cooling pipeline It includes a first part located inside the first heat exchange device 11 and a second part located inside or on the outer surface of the stator; wherein the cooling liquid in the liquid cooling pipeline flows through the first part and the second part successively. In this embodiment, by adopting the above structure, the heat generated by the wind power generator is transferred to the first heat exc...

Embodiment 2

[0094] This embodiment is a stator. For the convenience of description, this embodiment continues to refer to the reference numerals in Embodiment 1. The stator of this embodiment includes the above wind power generator cooling device 100, the stator is a modular stator and includes a plurality of stator modules 40 distributed along the circumferential direction, each stator module 40 corresponds to at least one first heat exchange device 11 and at least one The second part of a liquid cooling circuit. In this embodiment, the cooling device 100 is used to transfer the heat generated by the stator module 40 efficiently, which is beneficial to reduce the temperature of the stator module 40 and to improve the stability of the wind power generator.

[0095] As an embodiment, at least one stator module 40 includes a plurality of second parts of liquid cooling lines connected in parallel. In other embodiments, all stator modules 40 have the same size, and all stator modules 40 corr...

Embodiment 3

[0097] This embodiment is a wind power generator, which includes the cooling device 100 in Embodiment 1 or includes the stator in Embodiment 2. For ease of description, this embodiment continues to refer to the reference numerals in Embodiment 1.

[0098] The wind-driven generator of this embodiment may include the cooling device 100 in Embodiment 1, and the use of the wind-driven generator containing the cooling device 100 is conducive to maintaining a relatively suitable temperature for the wind-driven generator and improving the stability of the wind-driven generator. It is beneficial to improve the power generation efficiency of the wind power generator.

[0099] The wind-driven generator of this embodiment may include the stator in Embodiment 2, and the use of the stator containing the cooling device 100 is conducive to maintaining a relatively suitable temperature for the wind-driven generator, improving the stability of the wind-driven generator, and improving wind powe...

technical field

[0001] The invention relates to the field of wind power generation, in particular to a cooling device, a stator and a wind power generator. Background technique

[0002] The copper loss and iron loss generated during the operation of the wind turbine will cause the temperature rise of the components of the wind turbine. Excessive temperature rise will directly affect the life of the wind turbine and even cause it to fail to operate normally. Among the various parts of the motor, the winding insulation is most obviously affected by the temperature rise. Every 10°C increase in the winding insulation temperature will reduce the life of the winding insulation by about half. Exceeding the limit range, more seriously, may also cause complete breakdown of insulation and damage to the motor. For permanent magnet wind turbines, the temperature of the permanent magnets also needs to be controlled within a certain limit to prevent permanent degradation of motor perform...

Examples

Embodiment 1

[0071] Such as Figure 1-4 As shown, this embodiment is a cooling device 100 for a wind-driven generator. The wind-driven generator includes a stator, a rotor 30, an air gap 13 between the stator and the rotor 30, and a cooling device 100 for cooling the wind-driven generator. The cooling device 100 includes an air cooling system and a liquid cooling pipeline; the air cooling system includes a gaseous medium flow path for the gaseous medium to circulate inside the wind turbine and a first heat exchange device 11 arranged on the gaseous medium flow path; the liquid cooling pipeline It includes a first part located inside the first heat exchange device 11 and a second part located inside or on the outer surface of the stator; wherein the cooling liquid in the liquid cooling pipeline flows through the first part and the second part successively. In this embodiment, by adopting the above structure, the heat generated by the wind power generator is transferred to the first heat exc...

Embodiment 2

[0094] This embodiment is a stator. For the convenience of description, this embodiment continues to refer to the reference numerals in Embodiment 1. The stator of this embodiment includes the above wind power generator cooling device 100, the stator is a modular stator and includes a plurality of stator modules 40 distributed along the circumferential direction, each stator module 40 corresponds to at least one first heat exchange device 11 and at least one The second part of a liquid cooling circuit. In this embodiment, the cooling device 100 is used to transfer the heat generated by the stator module 40 efficiently, which is beneficial to reduce the temperature of the stator module 40 and to improve the stability of the wind power generator.

[0095] As an embodiment, at least one stator module 40 includes a plurality of second parts of liquid cooling lines connected in parallel. In other embodiments, all stator modules 40 have the same size, and all stator modules 40 corr...

Embodiment 3

[0097] This embodiment is a wind power generator, which includes the cooling device 100 in Embodiment 1 or includes the stator in Embodiment 2. For ease of description, this embodiment continues to refer to the reference numerals in Embodiment 1.

[0098] The wind-driven generator of this embodiment may include the cooling device 100 in Embodiment 1, and the use of the wind-driven generator containing the cooling device 100 is conducive to maintaining a relatively suitable temperature for the wind-driven generator and improving the stability of the wind-driven generator. It is beneficial to improve the power generation efficiency of the wind power generator.

[0099] The wind-driven generator of this embodiment may include the stator in Embodiment 2, and the use of the stator containing the cooling device 100 is conducive to maintaining a relatively suitable temperature for the wind-driven generator, improving the stability of the wind-driven generator, and improving wind powe...

Images